My First Interview experience at SAP Labs-First Technical Round

Yesterday it was memorable day for me.I had my first interview of my life and got placed at SAP LABS. When I cleared the written I don't know why I was confident that I will be shortlisted but I was. You can say it was my faith on my Allah (s.w.t.) that I will be shortlisted. I was at no. 12 out of 16 who were selected for interview round. In starting they told that they will be having only 2 interview rounds technical round followed by HR.But after that they told there are 3 rounds 2 technical followed by HR round.
         I thought even it was also difficult to get in 2 rounds how can I will be able to clear 3 rounds. First round was little bit difficult and I was also thinking that I will be thrown out from this round itself.Second technical and HR round were ultimate.I was much confident after HR round that I will be selected and I got selected. But it was surprise but expected because of my faith on Allah s.w.t. that I cleared 1st round and got into 2nd round.I went for JUMMA Prayer after 1st round and asked or I should say I begged from my Allah that if this company is good for me than place me today itself. because I have concept "Never wait till tomorrow which you can do today itself".So if I can get it today than why should I wait till tomorrow for any other company.

when I entered in the room I asked permission "May I come in Sir". He told "Yeah come in". Then normally surprised for students but truth that I take one more step and shook hand with interviewer saying "Sir,I am Arif." He replied" myself N****". Usually in college's interview this thing doesn't happen with students.It was my first interview so I shook hand even I didn't know that it was right or wrong but I did.

In first round he asked me first question" Introduce yourself".I was ready for this kind of question. I prepared my brief intro from "indiabix.com". Then I replied "first of all thanks to you sir giving me such a nice opportunity to introduce myself. I am Arif from Jhunjhunu Rajasthan.I did my schooling from village itself.Actually I am from village.After that I went to city jhunjhunu and upto 12th I studied there.After that I went to Kota. I was in Resonance coaching.After that I got selected for AIEEE and I went to NIT Jamshedpur.Then I got upgraded to NIT Calicut and I came here.Now I am pursuing My B.tech. degree in NIT Calicut.Currently I am in forth year.My father is a crane operator.My mother is a house wife.I have one brother and one sister.She is studying in 7th class and my bro is studying in Nursery."
He said "ok."
 2nd question he asked "tell me something interesting about yourself? "
"Don't relate to studies" he added.
I said" usually I make people to laugh".(my English was wrong but he understood what I meant)
He said in hindi "ohh to logo ki tang khinchte ho?"
I said in mix language "It's not tang khinchna sir."
but whenever I am there people usually laughing or if I am silent then they will ask why are you so silent today? may be I make some joke or kind of comment which make them laugh"
he said "ok"
then he started asking some technical questions.some question I remembered are he gave me one scenario between  colleges and companies and asked me to draw an ER diagram.
    Next question he asked related to two tables he gave me two tables and asked now make primary key and foreign key between these tables. Next one as I remember he asked me what is 2nd normal form? then 3rd normal form.actually I by hearten all  normal forms but only definition.
          Now he gave me one question that you have attributes A,B,C,D,E. A is dependent on B,C,D,E. Now B is dependent on C and D. which normal form will you use? I told 3rd one because Transitive dependency is there.He asked me to remove transitive dependency.I tried again and again and told him something but he was not satisfied with me.
In between he asked me in hindi "kuch padh ke aaye ho ya nai?"
 I replied "yes sir I studied but only definitions I read".
He again added " we don't want definition.you should have basic knowledge so you can apply it".
 I told "sir actually DBMS we had in S4 (fourth semester ). recently I didn't study."
Then he asked "what did you study recently?"
I replied "sir OS and DS."
Then he started asking me question related to Data Structure.
first question he asked "reverse the linked list".
I knew the complete code actually. I did this question in my room itself before 2 or 3 days.So I started writing the code even if could write code without making diagrams of linked list.but I made some rough diagrams to showing him that this question is new for me and replied correctly.
        Now he asked 2nd question. check if there is any loop in linked list. I told and then he asked 2 more coding questions.He asked me to find nth  element from last end in linked list. I did with taking total no. of nodes as N. now he again asked now do without using total no. of nodes in linked list.then I tried but couldn't satisfy him.
 Now he told that use two simultaneous pointers and increment simultaneously both. Those who know programming very well got the cleared Idea.
After that he asked me  "Do you wanna solve puzzle?"
I replied "Sir,If you will give me I  will try my best."
He gave me one puzzle.There are 16 rooms in a jail.He draw a square and divide it into 16 parts.On one corner one jailer is standing on door and the opposite corner one made person is there.whenever he see a prisoner he kills him and if he see a killed man then he kills himself.All other room having one prisoner each.Now he has to cross the all rooms and want to go out but he can go out only after killing all prisoner and jailer. just try it out. After that he went out from room.
After  about 5 mins he came and asked" Have you solved?".
I nodded " Sir, I am solving."
After that he told me one hint that I will not share here.Because I want to give this puzzle to all my readers.Solve it if you are not able to solve than ask me.
In last he asked me "Do you have any question?"
"Yes sir" I nodded.
It was the moment when I thought that I will be thrown out from this round.But expecting good from my Allah.Because in starting in DBMS I couldn't answer properly any question but I told coding question almost right.But that was also not enough.
Then I asked that Sir tell me what are the areas which I can improve?
He started giving my feedback " You are week in practical knowledge.We don't want definition you should have basic knowledge so you can apply it.You were telling that you are from Hindi medium but your English is ok.I don't think that there is any problem in communication skills.I felt proud first time and nodded my head saying  "Thanks sir" .
 Then he continued "and your confidence level is also good."
I again said "Thank you sir". 

Edit:- This interview has so many grammatical mistakes as I was not good at English. Some of them now I can easily correct but I don't want to correct them now. I love it,  the way I wrote just after my interview. So please pardon me for my english and try to understand the feelings. Lol